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;;; company-dabbrev-code.el --- dabbrev-like company-mode backend for code -*- lexical-binding: t -*-
;; Copyright (C) 2009, 2011, 2014 Free Software Foundation, Inc.
;; Author: Nikolaj Schumacher
;; This file is part of GNU Emacs.
;; GNU Emacs is free software: you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation, either version 3 of the License, or
;; (at your option) any later version.
;; GNU Emacs is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;; GNU General Public License for more details.
;; You should have received a copy of the GNU General Public License
;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
;;; Commentary:
;;
;;; Code:
(require 'company)
(require 'company-dabbrev)
(require 'cl-lib)
(defgroup company-dabbrev-code nil
"dabbrev-like completion backend for code."
:group 'company)
(defcustom company-dabbrev-code-modes
'(prog-mode
batch-file-mode csharp-mode css-mode erlang-mode haskell-mode jde-mode
lua-mode python-mode)
"Modes that use `company-dabbrev-code'.
In all these modes (and their derivatives) `company-dabbrev-code' will
complete only symbols, not text in comments or strings. In other modes
`company-dabbrev-code' will pass control to other backends
\(e.g. `company-dabbrev'\). Value t means complete in all modes."
:type '(choice (repeat :tag "Some modes" (symbol :tag "Major mode"))
(const :tag "All modes" t)))
(defcustom company-dabbrev-code-other-buffers t
"Determines whether `company-dabbrev-code' should search other buffers.
If `all', search all other buffers, except the ignored ones. If t, search
buffers with the same major mode. If `code', search all buffers with major
modes in `company-dabbrev-code-modes', or derived from one of them. See
also `company-dabbrev-code-time-limit'."
:type '(choice (const :tag "Off" nil)
(const :tag "Same major mode" t)
(const :tag "Code major modes" code)
(const :tag "All" all)))
(defcustom company-dabbrev-code-time-limit .1
"Determines how long `company-dabbrev-code' should look for matches."
:type '(choice (const :tag "Off" nil)
(number :tag "Seconds")))
(defcustom company-dabbrev-code-everywhere nil
"Non-nil to offer completions in comments and strings."
:type 'boolean)
(defcustom company-dabbrev-code-ignore-case nil
"Non-nil to ignore case when collecting completion candidates."
:type 'boolean)
(defun company-dabbrev-code--make-regexp (prefix)
(concat "\\_<" (if (equal prefix "")
"\\([a-zA-Z]\\|\\s_\\)"
(regexp-quote prefix))
"\\(\\sw\\|\\s_\\)*\\_>"))
;;;###autoload
(defun company-dabbrev-code (command &optional arg &rest ignored)
"dabbrev-like `company-mode' backend for code.
The backend looks for all symbols in the current buffer that aren't in
comments or strings."
(interactive (list 'interactive))
(cl-case command
(interactive (company-begin-backend 'company-dabbrev-code))
(prefix (and (or (eq t company-dabbrev-code-modes)
(apply #'derived-mode-p company-dabbrev-code-modes))
(or company-dabbrev-code-everywhere
(not (company-in-string-or-comment)))
(or (company-grab-symbol) 'stop)))
(candidates (let ((case-fold-search company-dabbrev-code-ignore-case))
(company-dabbrev--search
(company-dabbrev-code--make-regexp arg)
company-dabbrev-code-time-limit
(pcase company-dabbrev-code-other-buffers
(`t (list major-mode))
(`code company-dabbrev-code-modes)
(`all `all))
(not company-dabbrev-code-everywhere))))
(ignore-case company-dabbrev-code-ignore-case)
(duplicates t)))
(provide 'company-dabbrev-code)
;;; company-dabbrev-code.el ends here
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